고체역학 (Gere) — Stresses in Beams (Basic Topics): Problem 5.5-22

5.5-22 A frame $ABC$ travels horizontally with an acceleration $a_0$ (see figure). Obtain a formula for the maximum stress $\sigma_{max}$ in the vertical arm $AB$, which has length $L$, thickness $t$, and mass density $\rho$.